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t <br /> Ms.Amy Eschberger Project No. 18107649 <br /> Colorado Division of Reclamation,Mining,and Safety September 5,2018 <br /> If you have any questions or comments about this request, please contact the undersigned at(303)980-0540. <br /> Sincerely, <br /> Golder Associates Inc. <br /> IA"—14� <br /> Sara Harkins, PG Randy March, PE, PG <br /> Senior Project Geochemist Principal Geological Engineer <br /> ELH/SAH/ds <br /> CC: Derrick Dease, Holcim (US) Inc. <br /> Attachments: Table 1 —Proposed Analyte List <br /> cAus W*inner%0der assocWtWp18107649,holdm boeeeher 2018 mg support w- <br /> delhrorabbsuetterslholdmtedraevision_05sep 18\18107649_holcim_techrevision_05sept2018.docx <br /> References <br /> Agency for Toxic Substances and Disease Registry(ATSDR), 2001. Public Health Statement of Asbestos <br /> CAS#: 1332-21-4.Available at: https://www.atsdr.cdc.govfToxProfiles/tp61-cl-b.pdf <br /> Golder, 2013. Proposed Changes to the Analytical List for Groundwater sampling at the Boettcher Quarry. Project <br /> Number 103-80640 February 5, 2013 <br /> United States Environmental Protection Agency(USEPA),1980.Ambient Water Quality Criteria for Chlorinated <br /> Phenols. EPA 440/5-80-032, October 1980. <br /> USEPA, 1992. Secondary Drinking Water Regulations: Guidance for Nuisance Chemicals, EPA 810/K-92-01, July <br /> 1992. <br /> USEPA, 2002. Toxicological Review of Phenol CAS# 108-95-2, EPA/635/R-02/006, September 2002. <br /> World Health Organization (WHO), 1996. Guidelines for drinking-water quality, 2nd ed.Vol. 2. Health criteria and <br /> other supporting information. <br /> k> GOLDER 3 <br />